If you don't own this book, you should

[Casper]

http://www.amazon.com/SAS-Survival-Guide-Collins-Gem/dp/0061992860/

 

Here's a PDF if you just want to browse it, but highly recommend buying a copy to have on hand: 

http://gonzoj.files.wordpress.com/2012/10/sas-survival-handbook-revised-edition.pdf

 

[baptizo]

I have that one along with a couple of SF books for my BOB.,...it's a great resource to have on hand.